# Copyright 2015 Confluent Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from ducktape.mark import parametrize
from ducktape.utils.util import wait_until

from kafkatest.services.console_consumer import ConsoleConsumer
from kafkatest.services.kafka import KafkaService
from kafkatest.services.verifiable_producer import VerifiableProducer
from kafkatest.services.zookeeper import ZookeeperService
from kafkatest.tests.produce_consume_validate import ProduceConsumeValidateTest
from kafkatest.utils import is_int
from kafkatest.version import LATEST_0_9, LATEST_0_10, TRUNK, KafkaVersion


class MessageFormatChangeTest(ProduceConsumeValidateTest):

    def __init__(self, test_context):
        super(MessageFormatChangeTest, self).__init__(test_context=test_context)

    def setUp(self):
        self.topic = "test_topic"
        self.zk = ZookeeperService(self.test_context, num_nodes=1)
            
        self.zk.start()

        # Producer and consumer
        self.producer_throughput = 10000
        self.num_producers = 1
        self.num_consumers = 1
        self.messages_per_producer = 100

    def produce_and_consume(self, producer_version, consumer_version, group):
        self.producer = VerifiableProducer(self.test_context, self.num_producers, self.kafka,
                                           self.topic,
                                           throughput=self.producer_throughput,
                                           message_validator=is_int,
                                           version=KafkaVersion(producer_version))
        self.consumer = ConsoleConsumer(self.test_context, self.num_consumers, self.kafka,
                                        self.topic, consumer_timeout_ms=30000,
                                        message_validator=is_int, version=KafkaVersion(consumer_version))
        self.consumer.group_id = group
        self.run_produce_consume_validate(lambda: wait_until(
            lambda: self.producer.each_produced_at_least(self.messages_per_producer) == True,
            timeout_sec=120, backoff_sec=1,
            err_msg="Producer did not produce all messages in reasonable amount of time"))
        
    @parametrize(producer_version=str(TRUNK), consumer_version=str(TRUNK))
    @parametrize(producer_version=str(LATEST_0_9), consumer_version=str(LATEST_0_9))
    def test_compatibility(self, producer_version, consumer_version):
        """ This tests performs the following checks:
        The workload is a mix of 0.9.x and 0.10.x producers and consumers 
        that produce to and consume from a 0.10.x cluster
        1. initially the topic is using message format 0.9.0
        2. change the message format version for topic to 0.10.0 on the fly.
        3. change the message format version for topic back to 0.9.0 on the fly.
        - The producers and consumers should not have any issue.
        - Note that for 0.9.x consumers/producers we only do steps 1 and 2
        """
        self.kafka = KafkaService(self.test_context, num_nodes=3, zk=self.zk, version=TRUNK, topics={self.topic: {
                                                                    "partitions": 3,
                                                                    "replication-factor": 3,
                                                                    'configs': {"min.insync.replicas": 2}}})
       
        self.kafka.start()
        self.logger.info("First format change to 0.9.0")
        self.kafka.alter_message_format(self.topic, str(LATEST_0_9))
        self.produce_and_consume(producer_version, consumer_version, "group1")

        self.logger.info("Second format change to 0.10.0")
        self.kafka.alter_message_format(self.topic, str(LATEST_0_10))
        self.produce_and_consume(producer_version, consumer_version, "group2")

        if producer_version == str(TRUNK) and consumer_version == str(TRUNK):
            self.logger.info("Third format change back to 0.9.0")
            self.kafka.alter_message_format(self.topic, str(LATEST_0_9))
            self.produce_and_consume(producer_version, consumer_version, "group3")


